Frost history / Alpine, CA
Alpine, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00040136, 1953 to 2025, measured from daily minimum temperatures.
Elevation 1,695 ft, 32.836, -116.778. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 25 | Dec 14 |
| Earliest | Jan 2 (1976) | Nov 4 (1956) |
| Latest | Apr 25 (1958) | Dec 28 (2018) |
| Trend | 3.2 days earlier per decade | 2.3 days later per decade |
| Years with data | 58, 15 with no freeze | 55, 20 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 1 and the median first fall date is Dec 22.
The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.
Chart
Last spring frost (32°F)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2025 | none | none | none | none |
| 2024 | none | none | none | none |
| 2023 | Apr 4 | none | none | none |
| 2022 | Feb 25 | none | none | none |
| 2021 | Jan 28 | Dec 16 | none | none |
| 2020 | Feb 5 | none | Feb 5 | none |
| 2019 | Feb 19 | none | none | none |
| 2018 | Feb 28 | Dec 28 | none | none |
| 2017 | none | none | none | none |
| 2016 | Feb 2 | Dec 18 | Feb 2 | none |
| 2015 | Jan 2 | Dec 27 | none | none |
| 2014 | none | Dec 27 | none | none |
| 2013 | Feb 22 | Dec 9 | Jan 15 | none |
| 2012 | Feb 28 | Dec 19 | none | none |
| 2011 | Feb 27 | Dec 5 | none | none |
| 2010 | Feb 23 | Nov 29 | none | none |
| 2009 | Feb 13 | Dec 23 | none | none |
| 2002 | Mar 25 | no data | none | no data |
| 2000 | none | no data | none | no data |
| 1999 | none | no data | none | no data |
| 1997 | no data | none | no data | none |
| 1996 | none | no data | none | no data |
| 1995 | none | none | none | none |
| 1994 | none | no data | none | no data |
| 1993 | no data | none | no data | none |
| 1991 | Mar 16 | no data | none | no data |
| 1990 | Feb 19 | no data | Feb 15 | no data |
| 1989 | Feb 6 | none | none | none |
| 1988 | Jan 20 | Dec 27 | none | none |
| 1987 | Jan 17 | Dec 14 | Jan 17 | Dec 25 |
| 1986 | none | none | none | none |
| 1985 | Mar 3 | none | Feb 1 | none |
| 1984 | no data | Dec 14 | no data | none |
| 1983 | Apr 14 | none | none | none |
| 1982 | no data | Dec 24 | no data | none |
| 1981 | none | none | none | none |
| 1980 | none | none | none | none |
| 1979 | Feb 17 | Nov 20 | Jan 29 | none |
| 1978 | Jan 24 | Dec 6 | none | Dec 6 |
| 1977 | Mar 31 | Nov 13 | none | none |
| 1976 | Jan 2 | Nov 28 | Jan 2 | none |
| 1975 | Jan 3 | Dec 15 | Jan 3 | none |
| 1974 | Jan 29 | Dec 23 | Jan 11 | Dec 23 |
| 1973 | no data | Dec 13 | no data | Dec 20 |
| 1972 | Apr 9 | no data | none | no data |
| 1971 | Mar 3 | no data | Jan 8 | no data |
| 1970 | Jan 5 | none | none | none |
| 1969 | no data | Dec 27 | no data | none |
| 1968 | Jan 29 | Dec 17 | none | Dec 21 |
| 1967 | none | Dec 14 | none | none |
| 1966 | Mar 3 | Dec 28 | Mar 3 | none |
| 1965 | Feb 12 | Dec 23 | Feb 12 | none |
| 1964 | Mar 3 | Nov 14 | none | none |
| 1963 | Mar 18 | none | Jan 20 | none |
| 1962 | Mar 14 | Dec 27 | Mar 1 | none |
| 1961 | none | none | none | none |
| 1960 | Jan 17 | Dec 7 | none | Dec 9 |
| 1959 | none | Dec 14 | none | none |
| 1958 | Apr 25 | Nov 16 | none | Nov 18 |
| 1957 | Mar 23 | none | Jan 31 | none |
| 1956 | Mar 19 | Nov 4 | Feb 17 | none |
| 1955 | Apr 5 | Nov 24 | Feb 22 | Dec 31 |
| 1954 | Mar 26 | Dec 26 | Jan 3 | Dec 27 |
| 1953 | Apr 11 | Nov 19 | Feb 23 | Dec 24 |
"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.